DE977979C - - Google Patents

Description

Polypropylene glycol 41.90 · / »

Toluene diisocyanate 22.35%

Plasticizer based on glycerine monoricinoleate

(Flexricin) 10.15 ° /

Butylene glycol 5.60%

Dioctyl sebacate 20.00%

18.5% of this binder is mixed with an oxidation salt mixture, consisting of

Ammonium perchlorate 80.25%

Ferrocene 1.00%

Lecithin 0.25%

- as described above - processed

The finished propellants had a tensile strength of 11 kg / cm ² and an elongation of 28%.

In the following table some further binder mixtures are given, as they are for processing ao Processing in solid propellants according to the invention are particularly advantageous.

Π
(Vt) ΠΙ
(V.) IV
<· / ·) Desmophs
Glycerol monoricin oleate
(Flexricin)
2-hydroxymethyl-4-
oxy-pentanol-1
Butylene glycol
Dioctyl sebacate
Toluene diisocyanate. 39.06
9.46
6.94
19.97
24.57 52.45
3.67
3.15
19.95
20.78 41.90
10.15
5.60
20.00
22.35 Ferrocene
Tensile strength, kg / cm ² ..
Strain, % 100.00
3.00
22nd
160 100.00
2.00
20th
100 100.00
2.00
14th
130

Claims (15)

1 . .r, J 2 \. for the production of solid fuel charges on the base Patent claims of oxidation bars, polyarethane binders and other ¹ 'stigen usual additives a binding shaker mix Polyurethane crosslinked with diols and triols, used alongside ^ inem diisocyan ^, an iron resin for use in solid propellants to 5% clbpentadieny> Verbjnäung as accelerator and the basis of mixtures of this resin as other customary additives, such as plasticizers Fuel / binder 'with inorganic Oxyda- and the like, a proportion of about 3 to 10 Vo of a short- toren, jiebst additions of plasticizers, iron-chain diols and about 5 to 12 Vo of a tnol, contains cyclopentadienyl compounds from accelerator The preferred diol is butylene glycol, and other customary additives, thus in the form of triol glycerol monoricinoleate or 2-hydroxy indicates that the polyurethane resin is provided with methyl-4-oxy-pentanol-l and others. 3 to 10 Vo of a short-chain diol, special? . In addition, the branding mixture contains the usual Butylene glycol and with 5 to 12 Vo of a pot, ' additions of plasticizers, such as those on the base especially glycerol monoricinoleate, is crosslinked. of propylene glycol or glyceryl monoricinoleate, 15 those under the trade name Flexricin or ID-Perlargonat, DOS, TOF, etc. are known, an accelerator based on an iron cyclopentadienyl Compound in amounts of about 0.5 to 5%. As Di- isocyanate component is preferably toluenedi- ao isocyanate or naphthylene-1.S-diisocyanate used. In addition to very good technological properties, In the production of solid propellants, which have the end products, is in the invention essentially on the basis of oxidation salts and appropriate binder mixtures one sufficient Synthetic resin binders are built up, the inherent long setting time for processing and homogeneity properties of the binder play a decisive role. He »5 ization of the propellant bodies guaranteed, On the one hand, the finished propellant must be very good. In the following examples, the invention in the mechanical properties, in particular with regard to individual ones, explained in more detail:
Tensile strength, elongation and elasticity, impart, on the other hand, in the production of the propellant, Example 1
the setting time within which the hardening 3 » occurs, be dimensioned in such a way that sufficient homo- In a 3-1 stirred vessel, a binding agent genization of the propellant components is possible. mixture by intimately processing the following It has already been proposed as a binder for component manufactured.
Solid propellants use polyurethanes, however the 3s polypropylene glycol 39.06Vo toluylene diisocyanate 24.57 vol meet in a satisfactory manner. Plasticizers based on For example, it is known to produce glycerol monoricinoleate of a polyurethane resin in addition to toluene diisocyanate (Flexricin) 9.46% a long chain diol, such as polypropylene- ♦ < > Butylene glycol 6.94 ° / » Lenglycol, a polyether glycol and / or polyester glycol dioctyl sebacate 19.97% to use kol together with a crosslinker, such as a triol (hexanetriol, glycerol monoricinoleate, 19% of this binding mixture then becomes 2-hydroxy-methyl-4-oxy-pentanol-1) and / or an oxidation salt mixture of the following square (NN, N'N'- tetrakis ^ -hydroxy-propyl-ethy-45 composition added,
lenediamine) or a short-chain diol, e.g. B. butylene glycol or an amine. Ammonium perchlorate 80.25 vol By varying the type and amount of hardening or hardening in the ferrocene. Poly Resin-processed diols-triols etc. can use the mensation accelerator 0.50Vo Properties in a wide range advertising changed 5 »Lecithin 0.25 ⁰ Zo the. When using the polyurethane as Component in solid propellants, it is required by intensive 2 to 4 hours of kneading that the product has very good mechanical properties produced by a completely homogeneous mass has, in particular that the tensile strength, the Deh-Casting is processed into propellant bodies. To tion and elasticity assume optimal values. 55 curing for about 10 days at about 60 ° C To achieve this, it would be desirable if the propellants were ready to use. You owned Polyurethane has a high proportion of a short-chain with a tensile strength of 14 kg / cm * when stretched Diols, such as butylene glycol, together from 30%. With the previously known solid propellants with triplets, such as glycerol monoricinoleate, hexanetriol, sets based on polyurethane resins 2-Hydroxy-methyl-4-oxy-pentanoH, to be used. 60 does not reach these values, the tensile strength is in Such mixtures have hitherto been generally at around 5 to 8 kg / cm ⁸ , the elongation at not used as a binder for solid propellants, about 20 to 40%. because in terms of processing technology they are not considered to be appeared useful. It has now been found that Example 2 Binders that contain very specific proportions of diols 65 and triplets contain, lead to products that up- In a corresponding manner as in Example 1 Technological properties not achieved before are written down, a binder mixture is made from the point. According to the method of the invention, the following components are produced: